Will new RTX 3080ti cards require a PCIe 4.0 slot to work? - Video ...
Will a PCIe 2.0 work in a PCIe 3.0 slot? ... It'll surely be a bottleneck if you're using a PCIe 3.0 or 4.0 card in a PCIe 2.0 slot.
Can I Use a PCIe 4.0 Graphics Card in a PCIe 3.0 Slot? - TechReviewer
You can use a PCIe 4.0 SSD in a PCIe 5.0 slot, and it will work just fine, at PCIe 4.0 speeds. Similarly, a PCIe 5.0 SSD can be used in a PCIe 4.0 slot, but again, its performance will be limited to PCIe 4.0 levels.
Everything You Need to Know About PCIe 4.0 - trentonsystems.com
The PCIe standard is backward compatible, so an older PCIe card operating on PCIe 2.0 standard will fit in a PCIe 3.0 slot.
Khe cắm PCIe x1 nhỏ được sử dụng để làm gì?
The PCIe x1 slot has only one PCIe lane. Although there is only one PCIe lane, the PCIe x1 slot can be used for a variety of low-power PCIe peripheral cards.